Evidence map›Paper›PMID 40534889›Full record

ArticleFrontiers in immunology2025

Effects of low-frequency and high-frequency electroacupuncture pretreatment on the COX-2/mPGES-1/PGE2 pathway in a rat model of cold-coagulation dysmenorrhea.

Yue Song, Jinxia Ni, Jingxue Yuan, Ziniu Zhang, Dinghao Wang, Zhihao Xiong

Abstract read
In one paragraph

Article in Frontiers in immunology, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 7 papers.

0numbers the graph read from it
0cells of the map it votes in
7citing papers in PubMed
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

7 citing papers in PubMed.

  1. Article
  2. Article
  3. Endogenous mediators in regulating primary dysmenorrhea.Frontiers in cell and developmental biology · 2026
    Review
  4. Review
  5. Article
  6. Article
  7. Review
4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

6 authors.

Yue SongDongzhimen Hospital, Beijing University of Chinese Medicine, Beijing, China.
Jinxia NiDongzhimen Hospital, Beijing University of Chinese Medicine, Beijing, China.
Jingxue YuanDongzhimen Hospital, Beijing University of Chinese Medicine, Beijing, China.
Ziniu ZhangDongzhimen Hospital, Beijing University of Chinese Medicine, Beijing, China.
Dinghao WangDongzhimen Hospital, Beijing University of Chinese Medicine, Beijing, China.
Zhihao XiongDongzhimen Hospital, Beijing University of Chinese Medicine, Beijing, China.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Primary dysmenorrhea (PD) refers to a condition in which women experience cyclic lower abdominal pain, often accompanied by lower back pain, and even severe pain and fainting around menstruation, significantly affecting daily activities and work. Inflammatory factors such as prostaglandins PGF2α, PGE2, and COX-2 play key roles in the pathological mechanisms of PD. Nonsteroidal anti-inflammatory drugs (NSAIDs) and hormonal contraceptives are the first-line treatments for dysmenorrhea; however, they have significant side effects. Electroacupuncture, as a non-invasive and effective therapeutic method, is widely used as a complementary and alternative treatment, although its mechanism of action remains unclear. Methods: A cold-coagulation type dysmenorrhea model was established in rats, which were divided into the control group, model group, low-frequency electroacupuncture group (2/10 Hz), and high-frequency electroacupuncture group (20/100 Hz). Behavioral writhing responses, organ indices, uterine tissue morphology changes, and levels of PGF2α, PGE2, COX-2, and other inflammatory markers were measured to evaluate the effects of the treatments. Results: Both the low-frequency electroacupuncture group and the high-frequency electroacupuncture group significantly reduced writhing scores, increased spleen index, decreased prostaglandin PGF2α and COX-2 levels, and increased prostaglandin PGE2 and β-EP levels to varying degrees. Discussion: Both low-frequency and high-frequency electroacupuncture exert their anti-inflammatory and analgesic effects by activating the COX-2/mPGES-1/PGE2 pathway and mediating the increased release of the opioid peptide β-EP, which alleviates inflammatory pain. Both treatments achieve the therapeutic goal of treating PD, with high-frequency electroacupuncture demonstrating superior anti-inflammatory and analgesic effects compared to low-frequency electroacupuncture.

Indexed as

Cyclooxygenase 2DinoprostoneDysmenorrheaElectroacupunctureAnimalsCold TemperatureDisease Models, AnimalFemaleRatsRats, Sprague-DawleySignal TransductionCyclooxygenase 2DinoprostonePtgs2 protein, ratCOX-2/mPGES-1/PGE2 pathwaydysmenorrheahigh-frequency electroacupuncturelow-frequency electroacupunctureβ-EP

Identifiers

PMID40534889
PMCPMC12173867

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Registered trials

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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.